The students and their parents have repeatedly __________ to the school board about heavy work assignments. ( 章节：3 难度：3)
- A、told
- B、complained
- C、said
- D、explained
正确答案:B
答案解析:有
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The students and their parents have repeatedly __________ to the school board about heavy work assignments. ( 章节：3 难度：3)
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